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Message-ID: <8e7713ec-f187-41f5-ac8c-bec8142d702a@apache.org>
Date: Thu, 9 Apr 2026 20:51:47 +0100
From: Mark Thomas <markt@...che.org>
To: oss-security@...ts.openwall.com
Subject: CVE-2026-34500: Apache Tomcat: OCSP checks sometimes soft-fail with
FFM even when soft-fail is disabled
Severity: moderate
Affected versions:
- Apache Tomcat 11.0.0-M14 through 11.0.20
- Apache Tomcat 10.1.22 through 10.1.53
- Apache Tomcat 9.0.92 through 9.0.116
Description:
CLIENT_CERT authentication does not fail as expected for some scenarios
when soft fail is disabled and FFM is used in Apache Tomcat.
This issue affects Apache Tomcat: from 11.0.0-M14 through 11.0.20, from
10.1.22 through 10.1.53, from 9.0.92 through 9.0.116.
Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117,
which fixes the issue.
Credit:
Haruki Oyama (Waseda University) (finder)
References:
https://lists.apache.org/thread/7rcl4zdxryc8hy3htyfyxkbqpxjtfdl2
https://tomcat.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-34500
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